1、t a MIL-P-70475 (AR) , 8 JUNE 1984 MIL ITRY SPCIFICATIONS PAPER, NITROCELLULOSE BASE This specification is approved for use by the US Army Armament, Munitions and Chemical Command, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification
2、covers requirements, quality assurance provisions and packaging for the paper used to manufacture container assemblies or the propelling charges designated as M204/205 Charge, Propelling, used on the Lightweight Company Mortar System (LWCMS) and 81MM, M29A1 Mortar System. 2. APPLICABLE DOCUMENTS 2.1
3、 Governments documents. 2.1.1 Specifications and standards. Unless otherwise specified (see 6.2), the following specifications and standards of the issue listed in that issue of the Department of Defense Index of Specifi- cations and Standards (DoDISS) specified in the solicitation, forms . part of
4、this specification to the extent specified within. SPEC IF I CAT IONS MI L I TA RY MIL-A-48078 - Ammunition, Standard Quality Assurance Provisions, General Specification For STANDARDS MILITARY MIL-STD-286 - Propellants, Solid: Sampling, Examination and Testing 2.1.2 Other qovernment documents, drawi
5、nqs, and publications. The following other government documents, drawings, and publications form a part of this specification to the extent mecified herein. L FSC 1375 a Beneficial comments (recommendations, additions, deletions) and any pertinent data which may- be of use in improving this document
6、 should be addressed to: Commander, US Arm Armament Research and Development Center, Attn. DRSMC-QA, Dover, New Zrcey 07801 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. / THIS DOCUMENT CONTAINS 1 1 I PAGE
7、S i Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70Ll75 13 7977706 0354737 3 M MIL-P-70 47 5 (AR) DRAWINGS US. ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER 9381562 - Composition (Paper) (Copies of specifications, standards, handbooks, drawi
8、ngs and publications required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) PUBLICATIONS TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY (TAPPI) TAPPI T400 Sample and Accepting a Si
9、ngle Lot of Paper, Fiberboard, or Related Products. TAPPI T410 Weight Per Unit Area (Basis Weight or Substance) of Paper and Paperboard. TAPPI T411 Thickness (Caliper) of Paper and Paperboard. TAPPI T412 Moisture Content of Paper and Paperboard by Oven Method. TAPPI T494 Tensile Breaking Properties
10、of Paper and Paper- Board (Using Constant Rate of Elongation Apparatus). (Application for copies should be addressed to: Technical Association of the Pulp and Paper Industry, TAPPI, 1 Dunwoody Park, Atlanta, GA 30341). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D685 Conditioning paper an
11、d paper products for (Applications for copies of ASTM publications should be testing . addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103). Technical society and technical association specifications and standards are generally available for referenc
12、es from libraries. They are also distributed among technical groups and using Federal Agencies. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70Li75 13 9999906 035LI938 5 = MIL-P-70475 (AR) 2.1.3 Order of precedence. In the event of a confl
13、ict between this specification and the reference cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3.1 Paper. The paper shall comply with all the requirements specified in this specification, and with all requirements specified in applicable specifications and compo
14、sitions listed on drawing 9381562 when tested in accordance with paragraph 4.5.1. 3.2 Form and dimensions. The paper shall be furnished in rolls of the width and length as specified in the contract or order. 3.3 Tensile strenqth. 3.3.1 Breakinq strenqth. The paper shall have a tensile strength in th
15、e machine direction of 100 kilograms per meter, minimum, cross direction 80 kilograms per meter, minimum, when tested in accordance with paragraph 4.5.3. 3.3.2 Elonqation. The paper shall exhibit a minimum of elongation in the machine direction of 1.3 percent, in the cross direction of 1.75 percent
16、when tested in accordance with paragraph 4.5.3. 3.4 Thickness (caliper). The thickness of the paper shall be 0.050 plus or minus 0.005 inches when tested in accordance with paragraph 4.5.4. 3.5 Basis weiqht. The basis weight of the paper shall be 488 f. 24 grams per square meter when tested in accor
17、dance with paragraph 4.5.5. 3.6 Stability. The paper shall not completely change the color of the methyl violet paper to salmon pink color in less than thirty-five minutes when tested in accordance with paragraph 4.5.2. 3.7 Moisture content. The paper shall have a moisture content of 8 to 16 percent
18、 by- weight when tested in accordance with paragraph 4.5.6. 3.8 Percent by weiqht of resin and additives, kraft and poly- ester staple fiber. The percent by weight of resin and additives, kraft and polyester, staple fiber shall not be less than 12.95 and not more than 21.55 when tested in accordance
19、 with 4.5.1.3.5. 3.9 Workmanship. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70475 13 m 7K7706 0354737 7 m MIL-P-70475 (AR) I 3.9.1 Rolls before wrappinq. The roils of paper shall be free from dirt, gritr oil, qrease and other foreign ma
20、terial. The paper shall have no blue, gray or other non-conforming colored spots. 3.9.2 Rolls after wrappinq. The rolls of paper and wrapping shall be free from oilF grease and other foreign material that may be absorbed by the wrapping. 4. QUALITY ASSURANCE PRQVISIONS 4. Responsibility for inspecti
21、on and standard quality assurance provisions. Unless otherwise specified herein or in the contract, the provisions of MIL-A-480.78 shall apply and are hereby made a part of this detail specification. The paper shall have no lumps, spots or high spots before made into a roll. 4.2 CIassificatios of in
22、spections. The following types of inspection shall be conducted on this Item: a. First Article inspection b. Quality conformance inspection 4.3 First article inspection. Not required. 4.4 Quality conformance inspection. 4-4.1 Inspection lot formation. Inspection lots shall comply with the lot format
23、ion provisions of MIL-A-48078, Each lot of paper shall contain: (i) Nitrocellulose from not more than one lot from one manu- (2) Diphenylamine from not more than one lot from one manu- (3) Acrylcc fibers from not more than one lot from one manu- (4) Polyester fibers from not more than one lot from o
24、ne (5) Kraft fibers from not more than one lot from one manu- (6) Resin from one manufacturer. (7) Resin additives from one manufacturer. facturer. facturer. facturer. manufacturer. fact ur er . 4.4.2 Examination. See MIL-A-48078. Conditioning shall be in accordance with ASTM Method D 685, for a min
25、imum of 4 hours. Unless otherwise specified in the Classification of Defects and Test tables, sampling plans for major and minor defects shall he in accordance with MIL-STD-105, Inspection Level II, 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M
26、IL-P-70475 13 m 7797706 03547110 3 mj rl 8 t rl a al rn m al u? O rl 5 rl rl al u O Li ci .rl z a k Li a, pi rl cv w w . b rl mm*lncvrllD m .e. 3 v)v)v)mmv)v) tn rlcv mmwmlDrlb QI mmmmmmm m e . al u cl (d 5 Li LP, U rn a, U Y tr 8u G cc LIE m o a .rl c rn c Y 3 2 8 8 O a w O a, u C al a -rl 3 w u4 O
27、 ai Li (LI c v c O .a U u QI ri a, rn u c (d al N .d rn ar ri a m 41 Ej 5 i 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-z O B u w pi v1 H H 2 8 2 w u 2 ffi O Fri z * B H 3 a li 8 d tri c a 4 2 j. Li a, +J u4 4 . ai (B (d a, (B O d 3 r( d a, u O
28、 Li c, .d z a . Li ai pi i? N N zr cr . . - MIL-P-70975 13 W 7777706 0359791 5 W li d rd (d 5 5 tn VI .d .d 3 3 N QI m m . 8 dP dP m O W O d O a, Li 5 u a, (B JJ O c 8 c Li O u d rd -4 Li ai . U +J a, c 2 d U tn ai c 0 4 a 2 j. ai c O z pi c (B c 24 -4 E o 3 Li O O pi rcI O a, u c a, rcj 3 w 4 Provi
29、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL -P -7 O 4 7 5 (AR ) 4.4.3 Testing. 4.4.3.1 Composition (see dwq. 9381562). Five samples shall be selected from each lot and tested in accordance with 4.5.1. The lot shall be rejected if any sample fails
30、to comply with the require- ments. 4.4.3.2 Stability. Five samples shall be selected from each lot and tested in accordance with 4.5.2. The lot shall be rejected if any sample fails to comply with the requirements. 4.4.4 Inspection equipment. The inspection equipment required to perform the examinat
31、ions and tests prescribed herein is described in the “Paragraph Ref erence/Inspection-Method“ column in the Quality Conformance Inspection Tables. The contractor shall submit for approval inspection equipment designs in accordance with the terms of the contract. See Section 6 of MIL-A-48078 and 6.3
32、herein. 4.5 Test methods and procedures. NOTE: “This specification covers sampling and testing of chemical, toxic, or explosive materials which are potentially hazardous to personnel. It is emphasized that all applicable safety rules, regulations, and procedures must be followed in handling and proc
33、essing these materials“ . 4.5.1 Composition. 4.5.1.1 Preparation of samples. Each sample shall be cut into approximately 1/4 inch squares. From each sample, approximately 0.5 gram shall be selected for testing and weighed to the nearest 0.2 milligram (Weight A) in an extraction thimble. The same thi
34、mble shall be utilized during the extractions in 4.5.1.3.1 and 4.5.1.3.3. 4.5.1.2 Total volatiles. The samples from 4.5.1.1 shall be dried for 3 hours and 100 2 2OC, cooled in a desiccator (1/2 hr. min.), and weighed to the nearest 0.2 mg (Weight W). Calculate the percent total volatiles as follows:
35、 Percent (%) Total Volatiles = A - W X 100 A 4.5.1.3 Analytical procedure. 4.5.1.3.1 .Solvent extraction. Using a tared, extraction coarse, sintered glass thimble, extract each sample from 4.5.1.2, with methylene chloride, for a minimum of 16 hours in a Roweg extractor (MIL-STD-286, Method 104.1.3).
36、 Evaporate the extract to dryness, using a current of clean, dry air. This extract is to be used for diphenylamine determination in 4.5.1.3.2. Dry the residues (non-extractable material) in the extraction thimbles by aspirating the thimble and contents until the odor of methylene chloride is non dis
37、cernable. Dry the thimble plus residue for 1/2 hour minimum at 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70475 13 = 79977Ob 0354943 7 MIL -P -7 O 4 7 5 (AR ) 100 otherwise, continue titration until the blue color is discharged and shaki
38、ng produces. no further color. Calculate the percent DPA as shown in MIL-STD-286, Method 201.1.4, paragraph 5.13. 4.5.1.3.3 Nitrocellulose. To provide heat conduction to the solvent, place a sufficient quantity of glycerin on the flask bottom and on the surface of the heat source to produce a contin
39、uous film. Add 10 ml of ethyl alcohol to the thimble and residue from 4.5.1.3.1 and extract with acetone using the method in 4.5.1.3.1. After extraction dry the residue remaining 100 4 2OC for one hour. Cool in a desiccator (1/2 hr. min.), weigh to the nearest 0.2 mg (Weight D) and save the acrylic
40、determination in 4.5.1.3.4. Evaporate the acetone extract to dryness and add 25 ml of n-butyl acetate and 45 ml of glacial acetic acid. Replace the air with a stream of inert gas (CO2 or N2). Maintain the inert atmosphere throughout this test. Reflux the solution for five minutes. Add to the flask,
41、via the condenser, 25 ml of 0.7N ferrous ammonium sulfate (prepared per MIL-STD-286, Method 604.1.1) and 10 ml concentrated hydrochloric acid. Reflux for thirty minutes more to obtain a yellow liquid in which the specimen is completely disintegrated. With the inert gas still running, cool in a water
42、 bath to room temperature. Add 5 ml of 20% ammonium thiocyanate solution (MIL-STD-286, Method 706.1) Titrate with a -0.2N titanous chloride solution (MIL-STD-286, Method 601.1.1). Perform a blank titration on the reagents. Calculate percent NC as follows: Percent (%) NC = (46.69) (N) (V-B) (Ern) Whe
43、re: V = Volume titanous chloride used Lar sample, m B = Volume titanous chloried used for blank, ml W = Weight of dried sample, gm N = Normality of titanous chloride E -= Percent nitrogen in the nitrocellulose 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
44、m IHS-,-,- MIL-P-70475 (AR) 4.5.1.3.4 Acrylic. Reaqents SULFURIC ACID - 93 - 98% H2SO4, N2 Free MERCURIC OXIDE (H$) - Reagent Grade, N2 Free PWASSIUM SULFATE OR ANHYDROUS SODIUM SULFATE Free Reagent Grade, N2 THIOSULFATE SOLUTION - 160 g Na2S2035H20 dissolved in one liter of H20 SODIUM HYDROXIDE - 4
45、00 g solid NaOH dissolved in H20 and diluted to one liter METHYL RED INDICATOR - 1 g methyl red dissolved in 200 ml ethyl alcohol METHWNE BLUE INDICATOR ethyl alcohol -19 methylene blue dissolved HYDROCHLORIC or SULFURIC ACID STANDARD SOLUTION - 0.1N BORIC ACID SOLUTION - 4 g H3B04 dissolved in 100
46、ml H20 HENGAR GRANULES in 200 ml Apparat us DIGESTION - Use Kjeldahl flasks of hard, moderately thick wall- annealed glass with total capacity of 500 to 800 ml. Conduct digestion over a safety-approved heating device adjusted to bring 250 ml H20 at 25OC to a rolling boil in five minutes. DISTILLATIO
47、N - Use a Kjeldahl flask of 500 to 800 ml capacity fitted with a rubber stopper. The low end of an efficient scrubber bulb or trap is passed through the rubber stopper to prevent mechan- ical carry over of a NaOH during distillation. Use rubber tubing to connect the upper end of the bulb to the cond
48、enser tube. Trap the condenser outlet to insure complete absorption of distilled NH3 into boric acid in the receiver. Analysis Quantitively transfer the residue from 4.5.1.3.3 to a Kjeldahl flask, add 3-4 Hengar granules, 0-79 of HgO, 15.09 of KzSO4 or Na2S04, and 25 ml H2SO4 to the flask. Place the
49、 flask in an inclined position, and heat gently until frothing ceases. Boil the contents of the flask briskly until the solution clears, Continue 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-P-70475 13 m 7799906 0354745 2 m MIL-P-7 O 4 7 5 (AR) boiling 1/2 hour minimum. Allow the solution to cool to room temperature. Add 200 ml H20
